Ok im gona step in here and say YOU ARE AN IDIOT! you just compared a lsx GMPP crate motor to a private BBC builder. EVERYONE know all crate motors are CRAP! they are built for the "rich idiot that wants a 100% gm motor" that lsx 454 does NOT have a "big cam" it does NOT have "awesomly ported heads" all the parts in it are way over priced and dont match. Do you really think that a crate motor will hang with a fully built (and built right) 525ci BBC? NO they wouldent! you would have to be retarded to think that. Quit comparing apples to oranges. Yes if you want to run 6's N/A then you go with a big block, but seriously who give a flying fk if its N/A, i sure dont and thats all that really matter to me.